libraries/chart/pma_pchart_pie.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * @package phpMyAdmin
   5  */
   6
   7 /**
   8  *
   9  */
  10 require_once 'pma_pchart_multi.php';
  11
  12 /**
  13  * implements pie chart
  14  * @package phpMyAdmin
  15  */
  16 class PMA_pChart_Pie extends PMA_pChart_multi
  17 {
  18     public function __construct($data, $options = null)
  19     {
  20         // limit data size, no more than 18 pie slices
  21         $data = array_slice($data, 0, 18, true);
  22         parent::__construct($data, $options);
  23
  24         $this->setAreaMargins(array(20, 10, 20, 20));
  25     }
  26
  27     /**
  28      * prepare data set for the pie chart
  29      */
  30     protected function prepareDataSet()
  31     {
  32         // Dataset definition
  33         $this->dataSet->AddPoint(array_values($this->data), "Values");
  34         $this->dataSet->AddPoint(array_keys($this->data), "Keys");
  35         $this->dataSet->AddAllSeries();
  36         $this->dataSet->SetAbsciseLabelSerie("Keys");
  37     }
  38
  39     /**
  40      * graph area for the pie chart does not include grid lines
  41      */
  42     protected function drawGraphArea()
  43     {
  44         $this->chart->drawGraphArea(
  45                 $this->getGraphAreaColor(RED),
  46                 $this->getGraphAreaColor(GREEN),
  47                 $this->getGraphAreaColor(BLUE),
  48                 FALSE
  49         );
  50         $this->chart->drawGraphAreaGradient(
  51                 $this->getGraphAreaGradientColor(RED),
  52                 $this->getGraphAreaGradientColor(GREEN),
  53                 $this->getGraphAreaGradientColor(BLUE),
  54                 50
  55         );
  56     }
  57
  58     /**
  59      * draw the pie chart
  60      */
  61     protected function drawChart()
  62     {
  63         parent::drawChart();
  64
  65          // draw pie chart in the middle of graph area
  66         $middleX = ($this->chart->GArea_X1 + $this->chart->GArea_X2) / 2;
  67         $middleY = ($this->chart->GArea_Y1 + $this->chart->GArea_Y2) / 2;
  68
  69         $this->chart->drawPieGraph(
  70                 $this->dataSet->GetData(),
  71                 $this->dataSet->GetDataDescription(),
  72                 $middleX,
  73                 // pie graph is skewed. Upper part is shorter than the
  74                 // lower part. This is why we set an offset to the
  75                 // Y middle coordiantes.
  76                 $middleY - 15,
  77                 120, PIE_PERCENTAGE, FALSE, 60, 30, 10, 1);
  78     }
  79
  80     /**
  81      * draw legend for the pie chart
  82      */
  83     protected function drawLegend()
  84     {
  85         $this->chart->drawPieLegend(
  86                 $this->getWidth() - $this->getLegendMargin(RIGHT) - $this->getLegendBoxWidth(),
  87                 $this->getLabelHeight() + $this->getLegendMargin(TOP),
  88                 $this->dataSet->GetData(),
  89                 $this->dataSet->GetDataDescription(),
  90                 250, 250, 250);
  91     }
  92
  93     protected function getLegendBoxWidth()
  94     {
  95         $legendSize = $this->chart->getPieLegendBoxSize($this->dataSet->GetData());
  96         return $legendSize[0];
  97     }
  98 }
  99
 100 ?>